Where did the phrase "hairy eyeball" come from?

Solution 1:

the OED reveals:

hairy eyeball n. slang (orig. and chiefly U.S.) a look given with narrowed eyes; esp. one indicating hostility or disapproval; frequently in to give the hairy eyeball.

As in:

1961 Reno (Nevada) Evening Gaz. 11 Nov. 2/2 ‘He gave me the hairy eyeball.’ That meant he liked her.